Rhyming in Wordsworth's "Ode"

So I went through the poem and marked all of the rhymes, and I cannot tell if I was surprised or not that they didn't match. A poem of that length, well, the author would be hard pressed to make every rhyme scheme identical. But in some of the stanzas, the rhyme scheme just disappeared entirely. Granted, rhymes sound slightly different to everyone, but I think I got most of this right.

Take for instance, the third section. The rhyme scheme goes something like this:

A/ B/ B/ C/ C/ A/ D/ E/ E/ D/ F/ G/ G/ F/ F/ H/ H!

I note in each stanza whether every word has a match. Indeed, in some of the stanzas, the rhyme occurs three times, not just two. With the 'matching' rhyme scheme, there is almost more of a flow. All while trying to avoid the sing-songy voice that slips in while reading a poem, it does help the flow to the listener, I find.

So then moving along to the tenth section.

A/ B/ B/ A/ C/ C/ C/ D/ D/ E/ E/ F/ F/ G/ H/ I/ J/ K/ L.

In the beginning there is a relatively steady rhythm going on, but then when you get to the last six lines nothing fits and it draws attention those parts; as all disruption does in any aspect of life. Those lines are:

"In the primal sympathy
Which having been must ever be;
In the soothing thoughts that spring*
Out of human suffering;*
In the faith that looks through death,
In years that bring the philosophic mind."

I starred the two lines I had trouble rhyming. When you read it aloud, it does rhyme, but there needs to be a certain stress on the 'ing' of 'suffering'. So even if it is a rhyme, these last six lines are still a bit of an anomaly. Indeed, (as Steph mentioned in her post) this is the point where the child has reached a point of maturity, unable to return to the days of wondering at nature.

Also, an interesting note on the last section. Each word has a matching rhyme, except for the eleventh line, where the line ends with 'mortality'. Interesting that that particular word should stand alone, considering this poem concerns one of the most immutable facts of life: age and eventually, death.