and if im not delivering enough which is probably the case, okay, but it should tell me somewhere in the town window.
however its strange that once im starting to deliver water and food a town shrinks. no matter how much i deliver it should always have a positive effect.
i think a setup like mine should at least make the town not shrink but sustain.
Okay I looked at your save, and the problem in the first one is that you're not delivering any food to that town. Water delivery seems to be adequate enough, but even after you began food service (in the second save) the deliveries are right on the edge of being frequent enough, causing the fluctuation in the town growth. Increasing the frequency of food and water deliveries should solve the problem. One tactic that is useful in these situations is to stockpile the food and water delivered by train nearby, then use trucks to make a shorter, more frequent trip for the final delivery.
As far as the town window is concerned, I've already expressed my own desire to be able change at least some parts of the town window, unfortunately at least for now there is nothing I can do via NewGRF. Only GameScripts can currently alter information shown in the town window, so unless I make a GS specifically for Wasteland (on my wishlist, though currently out of my reach), there is nothing I can do to improve this.
I wonder if it would be possible to disable the rail types that wasteland includes so I can properly use NuTrack's, which still works but the introduction dates for the tracks get messed up by Wastelands Scavanged and normal tracks.
Well, the option to disable trains already exists, perhaps the default tracks should be disabled at the same time. Or it could be a separate parameter; either way your suggestion makes sense to me, I'll add it to my todo list
Also on an unrelated note, during my quick test I noticed that OpenTTD 1.7.0 RC1 seems to have broken all the strings, causing industry names to be replaced by vehicle names somehow. Very odd, I'll have to look into that as well to see if its OpenTTD causing the problem or Wasteland.