graphical glitch and terrain not being filled in all the way

1. load this save file (bug - graphical glitch.save) (v0.7.7 b470)
2. observe the stretching on the texture (seen below)
3. now, I fill it in with limestone (bug - graphical glitch 2.save)
4. observe that it did not get filled all the way (seen below)
5. now, I remove the barriers (bug - graphical glitch 3.save)
6. the problem seems to not have fixed itself (in 0.7.6, it would flatten out after I removed the barriers)

bonus bug: in the middle of that sequence above, when building two storages, a truck complains that he cannot reach the storages

1. load this file (bug - unreachable buckets.save)
2. observe that it says that the truck cannot reach the storages to build them
3. observe that there are 3 other buckets right next to the buckets I'm building which the trucks can reach just fine.
4. build the storages with unity and then let the game run a bit and both storages can be used just fine (see bug - graphical glitch 3.save
5. I've also seen the behaviour as well where a truck can deliver steel but not CP3 (or vice versa)

Double Backfill bug