Apparently this behavior is intentional by the developers. I guess they want you to either make multiple gathering toons, or work with other players to get the mats needed to raise your crafting skills.
The following is information that is posted on The RoM Wiki Gathering page:
Crafting skills include gathering skills such as mining, woodcutting and herbalism, and production skills such as blacksmithing, carpentry, armor crafting, tailoring, cooking and alchemy.
Every type of crafting skill has 5 tiers of availability:
* Level 1-20 Apprentice
* Level 20-40 Craftsman
* Level 40-60 Expert
* Level 60-80 Master
* Level 80-100 Legend
For each crafting skill, the more experience you have using it, the more your skill level will increase. However, once you hit the upper skill level limit for your tier, you will not be able to continue increasing levels in this way. Instead, you must first be promoted to the next tier by passing a special test.
Basically, you will be able to reach the apprentice tier for every skill. However, only 2 gathering and 4 production skills can be raised to the craftsman tier, only 1 gathering and 2 production skills can be raised to the expert tier and only 1 gathering and 1 production skill may be raised to the master and then to the legend tier. The gathering and production skills have now separate upgrade paths.
If you have maxed out the number of gathering skills you can have at a given ability tier (craftsman tier is limited to 2 gathering skills, the expert tier is limited to 1 gathering skills, and the master and legend tiers are limited as well to 1 gathering skill), but you would like to promote another gathering skill to that tier, you must first demote one of your current gathering skills.
For example, if your mining and woodcutting skills have reached the craftsman tier (or above), but you would now like to raise your herbalism skill to the craftsman tier, you must first demote either mining or woodcutting to the apprentice tier. Only then can you raise your herbalism skill to the craftsman tier.
Once you have demoted a skill's tier, that skill's level will drop to the upper limit of its new tier level. In other words, if you demote a skill from the craftsman tier to the apprentice tier, that skill's level will drop to level 20. This means that if you want to raise that skill to the craftsman level again in the future, you will need to start training it from level 20 once more.
This post has been edited 1 times, last edit by "LordKaedric" (Aug 4th 2013, 8:29pm)