It might be conflicting with the build in a2sd. Why not just use apps2sd? 80% of the space on /data is used by apps. I would say do custom mtd, but that doesn't really do a whole lot on the stock rom, since it's so fat.
i personally use data2ext not because its more space for the apps but also because the read/write speeds are faster to my class 6 sd card than it is to the internal
145.1 mb is the default size of /data. Nothing changed if that's all the space you have. If you got it to work you should have something more like 256 or 512 mb of storage.
Is 145 mb the total space? Or is it the free space? If that's your total space, that's your internal memory. Moving dalvik cache to the SD card will free up space on /data, quite a bit actually, but it won't actually increase the total size. If 145 mb is what is FREE on your internal storage, then either you have custom mtd partitions or apps2sd worked correctly.
Yes, that means everything should be okay, you did it right
