Help! Pro Tools midi to Cubase 6 tempo issues

Sorry to appear desperate, but I have several Pro Tools sessions from a client, from which I’m importing the tempo/ audio into Cubase 6. But many of the tempo maps are all over the place! I thought it was a Pro Tools bug, but now I’m not so sure. It’s making the Cubase tempo track editor go all over the map, even into tempos above 300, which I can’t grab or move. Anyone else having this issue or have a remedy? I’m just trying to avoid programming in PT if possible…

THANK YOU in advance!!!