diff --git a/src/system/src/vnodeImport.c b/src/system/src/vnodeImport.c
index 34a7a3b7d0efd54c2ec0d1068c05b066dde7b3d1..b7a5a71961368ffce7b23556007de39bd299d65d 100644
--- a/src/system/src/vnodeImport.c
+++ b/src/system/src/vnodeImport.c
@@ -169,7 +169,6 @@ int vnodeProcessLastBlock(SImportInfo *pImport, SHeadInfo *pHinfo, SData *data[]
     vnodeReadLastBlockToMem(pObj, &lastBlock, data);
     pHinfo->compInfo.numOfBlocks--;
     code = lastBlock.numOfPoints;
-    pImport->slot--;
   }
 
   return code;
@@ -237,12 +236,14 @@ int vnodeOpenFileForImport(SImportInfo *pImport, char *payload, SHeadInfo *pHinf
 
     } else if (pVnode->commitFileId == pImport->fileId) {
       int slots = pImport->pos ? pImport->slot + 1 : pImport->slot;
+      assert(slots >= 0);
       pHinfo->leftOffset += slots * sizeof(SCompBlock);
 
       // check if last block is at last file, if it is, read into memory
       if (pImport->pos == 0 && pHinfo->compInfo.numOfBlocks > 0 && pImport->slot == pHinfo->compInfo.numOfBlocks &&
           pHinfo->compInfo.last) {
         rowsBefore = vnodeProcessLastBlock(pImport, pHinfo, data);
+        if ( rowsBefore > 0 ) pImport->slot--;
       }
 
       // this block will be replaced by new blocks
@@ -787,6 +788,8 @@ int vnodeImportStartToFile(SImportInfo *pImport, char *payload, int rows) {
   code = vnodeFindKeyInFile(pImport, 1);
   if (code != 0) return code;
 
+  assert(pImport->slot >= 0);
+
   if (pImport->key != pImport->firstKey) {
     pImport->payload = payload;
     pImport->rows = vnodeGetImportStartPart(pObj, payload, rows, pImport->key);
@@ -845,7 +848,7 @@ int vnodeImportWholeToCache(SImportInfo *pImport, char *payload, int rows) {
 }
 
 int vnodeImportPoints(SMeterObj *pObj, char *cont, int contLen, char source, void *param, int sversion,
-                      int *pNumOfPoints) {
+                      int *pNumOfPoints, TSKEY now) {
   SSubmitMsg *pSubmit = (SSubmitMsg *)cont;
   SVnodeObj  *pVnode = &vnodeList[pObj->vnode];
   int         rows;
@@ -872,7 +875,7 @@ int vnodeImportPoints(SMeterObj *pObj, char *cont, int contLen, char source, voi
   payload = pSubmit->payLoad;
   int firstId = (*(TSKEY *)payload)/pVnode->cfg.daysPerFile/tsMsPerDay[pVnode->cfg.precision];
   int lastId  = (*(TSKEY *)(payload+pObj->bytesPerPoint*(rows-1)))/pVnode->cfg.daysPerFile/tsMsPerDay[pVnode->cfg.precision];
-  int cfile = taosGetTimestamp(pVnode->cfg.precision)/pVnode->cfg.daysPerFile/tsMsPerDay[pVnode->cfg.precision];
+  int cfile = now/pVnode->cfg.daysPerFile/tsMsPerDay[pVnode->cfg.precision];
   if ((firstId <= cfile - pVnode->maxFiles) || (firstId > cfile + 1) || (lastId <= cfile - pVnode->maxFiles) || (lastId > cfile + 1)) {
     dError("vid:%d sid:%d id:%s, invalid timestamp to import, firstKey: %ld lastKey: %ld",
         pObj->vnode, pObj->sid, pObj->meterId, *(TSKEY *)(payload), *(TSKEY *)(payload+pObj->bytesPerPoint*(rows-1)));
@@ -888,7 +891,7 @@ int vnodeImportPoints(SMeterObj *pObj, char *cont, int contLen, char source, voi
   if (*((TSKEY *)(pSubmit->payLoad + (rows - 1) * pObj->bytesPerPoint)) > pObj->lastKey) {
     vnodeClearMeterState(pObj, TSDB_METER_STATE_IMPORTING);
     vnodeSetMeterState(pObj, TSDB_METER_STATE_INSERT);
-    code = vnodeInsertPoints(pObj, cont, contLen, TSDB_DATA_SOURCE_LOG, NULL, pObj->sversion, &pointsImported);
+    code = vnodeInsertPoints(pObj, cont, contLen, TSDB_DATA_SOURCE_LOG, NULL, pObj->sversion, &pointsImported, now);
 
     if (pShell) {
       pShell->code = code;