Ben is correct, the A&A crews do all of the track work, train running and equipment repairs as they can.
Track equipment includes a Jackson tie inserter, ballast regulator, a switch tamper, larger production tamper and a back hoe. These have really sped up the track work progress. In the past, much of the work was done by hand. So it is easy to see why things don't always look like they are being repaired.
One thing to keep in mind with the A&A is that it has always been a shortline. Meaning that it's right of way was always in poor condition. Often filled with cinder base and second hand materials that were available. Many attempts were made at upgrades through the years. If you look at other shortlines that have taken over lines from larger roads, they generally tend to start with a better base, heavier rails and tie plates. The A&A "upgraded" to the 70 pound rail around the time of the demise of the B&S.
There is a section of 100 pound rail that was installed in the early 1980's that extends from Main Street, Arcade north for about one mile. There have been several grants that have improved things such as the bridge at Arcade, ties and crossings. Over the past several years and the help of State Grants, the A&A crews have purchased the added equipment and materials and really made a difference in some spots. The Reisdorf Mill has upgraded most of it's tracks and switches to 105. (Much of this acquired from the South Buffalo). Of course there is much more to do.
Drainage is another head ache that needs constant attention. As this is addressed, areas can be picked up out of the mud, ballast added and things straightened a bit.