Tabs: Magically Growing Tabs?

[T.V Raman]

I run with two tabs --- one where I am doing work, the other where I
am reading an ebook, C-tab makes this a very nice workflow.

So now  I have two tabs -- one called "Home" where I do work, one
called "EBooks" where I read. All is well for a few hours.
(length (tab-bar-tabs)) == 2

At some point, C-tab when in the Home tab switches to another tab
called "Home". When I investigate, 
(length (tab-bar-tabs)) == 3 or greater ---
I've seen the above number grow as high as 7 depending on when I check
--and have to close the extra tabs using C-x t 0.

Unclear as to what interaction triggres the creation of these tabs.

Note: I cannot see, so it's not possible to catch when this happen by
eyeballing the tab-bar line -- I only notice when C-tab doesn't do
what I expect.

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